US President Joe Biden’s performance in the recent televised presidential debate has sparked concerns about his campaign’s future. According to a report by Axios, citing White House aides, Biden is most effective during a six-hour window between 10 AM and 4 PM. Outside of this timeframe, or when traveling abroad, he is more prone to verbal miscues and fatigue. During the debate, Biden faced difficulties and uncertainties, raising questions among top Democrats about his ability to handle the rigorous months leading up to the November 5 elections. Donald Trump, the presumptive Republican Party candidate, engaged in heated clashes with Biden throughout the debate. Biden’s performance was met with alarm by Democratic Party supporters, who noted his frequent stumbling, awkward pauses, and subdued speaking manner. Despite the concerns, Biden has shown no indication of considering dropping out of the race. Meanwhile, Democratic donors are privately discussing potential replacements, with a shortlist including Michigan Governor Gretchen Whitmer, California Governor Gavin Newsom, and Vice President Kamala Harris. Trump has expressed skepticism about Biden withdrawing from the race, citing calls from certain Democrats and opinion writers urging Biden to step aside. He has also indicated his readiness to face Harris in the election. There is no indication that Biden is considering ending his campaign, and it would be highly challenging for Democrats to replace him unless he voluntarily decides to step down.